Unisci video
Concatena clip in un MP4
Informazioni su questo strumento
Join multiple video clips into one continuous file. Privvert re-encodes the inputs to a common format and resolution, so clips from different cameras, codecs and resolutions play seamlessly back-to-back without the glitches you get from naive concat.
Useful for stitching highlight clips into a reel, combining multi-take screen recordings, or assembling lecture chapters into a single deliverable. Everything happens in your browser with FFmpeg-WebAssembly - your raw footage is never uploaded.
Naive concat tools fail constantly in the real world because two clips rarely share identical codec parameters, frame rate, color space, audio sample rate and channel count - and stream-copy concat needs every one of those to match. Privvert sidesteps the problem by re-encoding each input to a normalized intermediate (H.264/AAC, common resolution, common frame rate) before concatenation, so clips from different phones, screen recorders and cameras stitch together cleanly.
Funzionalità
- Concatenate any number of clips into one file
- Drag-to-reorder list with previews
- Re-encodes to H.264/AAC in MP4 for universal compatibility
- Mismatched resolutions are scaled to a common size automatically
- Mismatched frame rates and codecs are normalized
- Browser-only - nothing uploaded
- Free and unlimited
Come si usa
- Drop in your video clips (or click to browse).
- Drag the rows to set the play order.
- Click Merge.
- Download the combined MP4.
Tutto avviene all'interno del tuo browser con JavaScript e WebAssembly. I tuoi file non vengono mai caricati su un server, mai memorizzati e mai visti da noi.
Domande frequenti
No - Privvert scales each clip to a common resolution (the first clip's size by default) so the merged file plays without resolution-change glitches.
Stream-copy concat only works when every clip has identical codec, resolution, frame rate, pixel format and audio parameters. That's almost never true in real-world footage, which is why naive concat tools produce broken files. Re-encoding is slower but always works.
There's a single generational re-encode loss. Use a high quality setting for masters.
Not in this tool - output is hard cuts. For transitions, use a video editor like DaVinci Resolve (free) or Shotcut.
Roughly the playback time of the combined output. A 10-minute merged result encoded at 1080p H.264 takes around 10-15 minutes on a modern laptop, longer on phones. Browser tabs need to stay open while encoding runs.
No - this tool concatenates video clips. To pair a separate audio track with a video, you need an editor like Shotcut or DaVinci Resolve. To stitch multiple audio files, see the audio merge tool.